Polyurethane forming system and composite material formed by same

Abstract

The invention provides a polyurethane forming system and a composite material. The polyurethane forming system comprises (A) an isocyanate; (B) an isocyanate reactive component comprising (b1) an organic polyol having a molecular weight of 1000 or less, an average functionality of 2-8, a hydroxyl value of 201-2000 mgKOH / g or more, and an amount of 50-95 wt% of the amount of (B); (b2) an organic polyol having a polyoxyethylene chain segment content of more than 30 wt%, an average functionality of 2-8, a hydroxyl value of 1-200 mgKOH / g, and an amount of 5-50 wt% of the amount of (B); (b3) an organic polyol having a polyoxypropylene chain segment content of 90 wt% or more, a molecular weight of 2000-10000, a hydroxyl value of 120 mgKOH / g or less, and an amount of 0-10 wt% of the amount of (B); and (C) a catalyst. The composite material provided by the invention has excellent adhesive force to a coating.

Description

Technical Field

[0001] The invention belongs to the field of polyurethane, and in particular relates to a polyurethane forming system and a composite material formed thereby. Background Art

[0002] Polyurethane profiles have the characteristics of high strength, low thermal conductivity, insulation, and corrosion resistance, and are suitable for energy-saving doors and windows, photovoltaic frames, etc. The aromatic polyurethane resin used in the profiles has weak UV resistance, so the profile surface is usually coated with a weather-resistant coating to achieve the effect of substrate protection and surface decoration.

[0003] The prerequisite for the coating to effectively protect the base surface is that the coating can effectively adhere to the base surface. Therefore, the adhesion of polyurethane profiles during coating becomes the most critical factor in coating.

[0004] In the process of profile pultrusion production, a certain proportion of release agent needs to be added to the resin to achieve a good demoulding effect. Previous studies have focused on how to remove the release agent, and the methods used include grinding, sandblasting, flame treatment, solvent scrubbing, etc. When the above treatment methods are used, the residual release agent on the surface of the profile can be effectively removed, but different treatment methods have significant differences in the adhesion of the paint layer to the surface. In addition to removing the release agent, grinding and sandblasting will also change the composition and morphology of the profile surface, and its effect on improving the final adhesion is also the most significant. This method can ensure that the profile adhesion reaches the 0 level. Flame treatment or solvent scrubbing can effectively remove the release agent, but it does not change the composition and morphology of the profile surface. Although the adhesion of the profile is improved by this type of treatment, it often cannot meet the adhesion requirements required by the coating.

[0005] CN106903910B discloses a coating method for a polyurethane pultruded composite material, in which a polyurethane pultruded composite material is prepared by a polyurethane pultrusion process, and a water-based coating is applied online to a portion of the profile at 30-90°C after the profile leaves a mold, and the profile is naturally cured by residual heat or cured by heating at an appropriate position, thereby achieving online coating of the polyurethane composite material. However, the polyurethane composite material has good adhesion only to water-based polyurethane paint, and has poor adhesion to other types of paints such as fluorocarbon paint. There are few types of paints compatible with the process, and there are obvious limitations.

[0006] Therefore, there is an urgent need for a polyurethane-based composite material profile that has excellent adhesion to the coating without treatment, which is universal for a variety of coatings and adapts to a wider range of application scenarios. Summary of the invention

[0007] In view of the shortcomings and defects mentioned in the technical background, the present invention aims to provide a polyurethane forming system and a composite material formed therefrom. The composite material has improved adhesion to the coating.

[0008] According to a first aspect of the present invention, there is provided a polyurethane forming system comprising the following components:

[0009] (A) isocyanate;

[0010] (B) an isocyanate-reactive component comprising:

[0011] (b1) one or more organic polyols having a number average molecular weight of 1000 or less, an average functionality of 2 to 8, and a hydroxyl value of 201 to 2000 mgKOH / g, in an amount of 50 wt% to 95 wt%, preferably 50 wt% to 90 wt%, based on the total mass of the isocyanate-reactive component;

[0012] (b2) an organic polyol having a polyoxyethylene segment content of 30 wt% or more, an average functionality of 2 to 8, and a hydroxyl value of 1 to 200 mgKOH / g, and an amount of 5 wt% to 50 wt%, preferably 10 wt% to 50 wt%, of the total mass of the isocyanate-reactive component;

[0013] (b3) one or more organic polyols containing polyoxypropylene segments and having a polyoxypropylene segment content of 90 wt % or more, having a number average molecular weight of 2000 to 10000 and a hydroxyl value of 120 mgKOH / g or less, and an amount of 0 wt % to 10 wt %, preferably 0 wt % to 5 wt % of the total mass of the isocyanate reactive component;

[0014] (C) Catalyst.

[0015] Preferably, the weight ratio of isocyanate (A) to isocyanate-reactive component (B) is 0.9 to 1.5.

[0016] Isocyanate component (A)

[0017] The "isocyanate (A)" described herein refers to isocyanates commonly found in the art, such as organic isocyanate monomers with -NCO, isocyanate prepolymers, epoxy-modified isocyanates, unsaturated modified isocyanates, phenolic-modified isocyanates, and mixtures thereof.

[0018] Preferably, the isocyanate (A) includes, but is not limited to, toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), dicyclohexylmethane diisocyanate (HMDI), naphthalene diisocyanate (NDI), p-phenylene diisocyanate (PPDI), 1,4-cyclohexane diisocyanate (CHDI), xylene diisocyanate (XDI), cyclohexane dimethylene diisocyanate (HXDI), trimethyl-1,6-hexamethylene diisocyanate (TMHDI), tetramethyl meta-xylene diisocyanate (TMXDI), norbornane diisocyanate (NBDI), dimethyl biphenyl diisocyanate (TODI), ), methylcyclohexyl diisocyanate (HTDI), tetramethylene diisocyanate, 2-methylpentamethylene diisocyanate, dodecamethylene diisocyanate, 4,4'-diisocyanato-3,3'-dimethyldicyclohexylmethane, 4,4'-diisocyanato-2,2-dicyclohexylpropane, poly(hexamethylene diisocyanate), octamethylene diisocyanate, toluene-α,4-diisocyanate, 2,4,6-trimethyl-1,3-phenylene diisocyanate, 4-chloro-6-methyl-1,3-phenylene diisocyanate, poly(tetrafluoroethylene oxide-co-difluoromethyleneoxy) α,ω-diisocyanate, 1,4-butane diisocyanate, 1,8-octane diisocyanate and at least one isocyanate selected from the above isocyanate prepolymers and modified products.

[0019] Organic polyol component (b1):

[0020] The "organic polyol component (b1)" described herein is an organic polyol commonly used in the art for preparing polyurethane polymer materials.

[0021] In an embodiment of the present invention, the organic polyol component (b1) includes, but is not limited to, polyether polyols, polyester polyols, polyether carbonate polyols, polycarbonate polyols, bio-based polyols or any combination of the above organic polyols, preferably polyether polyols, polyester polyols, bio-based polyols, or mixtures thereof, more preferably polyether polyols, polyester polyols or mixtures thereof, etc.

[0022] Preferably, the polyether polyol generally refers to an organic polyol series that can be prepared under the current existing process, which is mainly a class of compounds obtained by chemically reacting a polyol as an initiator and an alkylene oxide as a polymerization monomer under the action of a catalyst. The initiator includes, but is not limited to, water, ethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, 1,2-pentanediol, hexanediol, diethylene glycol, triethylene glycol, dipropylene glycol, diethylene glycol, neopentyl glycol, glycerol, trimethylolpropane, pentaerythritol, sorbitol, bisphenol A, bisphenol S, or a mixture thereof; the alkylene oxide includes, but is not limited to, ethylene oxide, propylene oxide, 1,2-butylene oxide, 2,3-butylene oxide, tetrahydrofuran, styrene oxide, or a mixture thereof; the catalyst includes, but is not limited to, an alkaline hydroxide, an alkaline alkoxide, antimony pentachloride, or a mixture thereof.

[0023] Preferably, the polyester polyol generally refers to an organic dicarboxylic acid (anhydride or ester) and a polyol through condensation (or transesterification) or by polymerization of a lactone and a polyol, the dicarboxylic acid includes, but is not limited to, phthalic acid, phthalic anhydride, phthalic acid ester, adipic acid, halogenated phthalic acid or a mixture thereof, the polyol includes, but is not limited to, ethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, 1,2-pentanediol, hexanediol, diethylene glycol, triethylene glycol, dipropylene glycol, diethylene glycol, neopentyl glycol, glycerol, trimethylolpropane, pentaerythritol, sorbitol, bisphenol A, bisphenol S or a mixture thereof, the lactone includes, but is not limited to, butyrolactone, lauryl lactone, tetradecalactone or a mixture thereof.

[0024] Preferably, the polyether carbonate polyol can be prepared by using a cyanide containing a bimetallic element as a catalyst to react a carbon dioxide core epoxy compound with a starting material containing an active hydrogen atom.

[0025] The bio-based polyol is an oligomer polyol obtained from animals and plants as raw materials, which is a renewable resource. The animal and plant raw materials include but are not limited to vegetable oils, animal fats, wood, rosin, starch, or mixtures thereof. The vegetable oil is a compound prepared from unsaturated fatty acids and glycerol or an oil extracted from plant fruits, neutrons, germs or mixtures thereof, including but not limited to castor oil, rapeseed oil, palm oil, soybean oil, peanut oil, etc.

[0026] Organic polyol (b2)

[0027] The organic polyols described in this article (b2)"It has the following characteristics: the organic polyol contains a polyoxyethylene segment, and the total mass content of the polyoxyethylene segment is more than 30wt%, the average functionality is 2 to 8, the hydroxyl value is 1 to 200mgKOH / g, and the amount thereof is 5wt% to 50wt% of the total mass of the isocyanate reactive component.

[0028] The organic polyol (b2) includes, but is not limited to, polyoxyethylene polyol, polyoxyethylene and polyoxypropylene copolymer polyol, copolymer of polyoxyethylene and polyester polyol, or any combination of the above organic polyols.

[0029] Organic polyols (b3)

[0030] The organic polyol (b3) contains a polyoxypropylene segment, and the total mass content of the polyoxypropylene segment is more than 90wt%, the number average molecular weight is 2000-10000, the hydroxyl value is less than 120mgKOH / g, and its usage is 0wt% to 10wt% of the total mass of the isocyanate reactive component, preferably 0wt% to 5wt%.

[0031] Catalyst (C)

[0032] The "catalyst (C)" described herein refers to a common polyurethane catalyst in the field of polyurethane materials, which can effectively react the isocyanate group with the hydroxyl group.

[0033] The catalyst (C) includes, but is not limited to, amine catalysts, organometallic catalysts, such as triethylamine, tributylamine, triethylenediamine, N-ethylmorpholine, N,N,N',N'-tetramethyl-ethylenediamine, pentamethyldiethylene-triamine, N,N-methylaniline, N,N-dimethylaniline, tin (II) acetate, tin (II) octoate, tin ethylhexanoate, tin laurate, dibutyltin oxide, dibutyltin dichloride, dibutyltin diacetate, dibutyltin maleate, dioctyltin diacetate, etc. Such catalysts can be used alone or in combination.

[0034] The catalyst (C) can be used in a conventional amount in the art. Preferably, the amount of the catalyst (C) is 0.05 wt% to 2 wt%, more preferably 0.1 wt% to 1 wt%, based on the total weight of the isocyanate-reactive component (B).

[0035] Preferably, the polyurethane-forming system according to the present invention may further comprise: (D) additives.

[0036] Additives (D)

[0037] The "additives (D)" mentioned herein are some functional additives or additives used in the polyurethane composition, and the functional additives and additives include, but are not limited to, chain extenders, small molecule raw materials, internal mold release agents, flame retardants, fillers, pigments, antioxidants, foaming agent stabilizers, light stabilizers, auxiliary antioxidants, hydrolysis stabilizers, bactericides and mildew inhibitors, defoamers, rheological agents, leveling agents, wetting agents, reactive diluents, coupling agents, color pastes, catalysts, water removers, molecular sieves, or mixtures of the above additives and additives. The above components can be stored independently from the polyurethane composition system.

[0038] Preferably, the total amount of the additive (D) is 0 wt% to 10 wt%, more preferably 1 wt% to 8 wt% of the isocyanate-reactive component (B).

[0039] According to a second aspect of the present invention, there is provided a composite material comprising:

[0040] Relative to 100wt% of the composite material,

[0041] 15 wt% to 40 wt% of a polyurethane matrix prepared from the polyurethane forming system according to the present invention; and

[0042] 60wt% to 85wt% of reinforcing material.

[0043] Reinforcement Materials

[0044] The “reinforcement material” described herein refers to a common reinforcement material in the art.

[0045] Preferably, the reinforcing material includes, but is not limited to, glass fiber (glass fiber), carbon fiber (carbon fiber), polyester fiber, natural fiber, aromatic polyamide fiber, nylon fiber, basalt fiber, boron fiber, silicon carbide fiber, asbestos fiber, whisker, metal fiber or a mixture of the above materials.

[0046] Preferably, the composite material can be prepared by hand lay-up molding process, injection molding process, resin transfer molding technology (RTM technology), bag pressing method (pressure bag method) molding, vacuum bag pressing molding, autoclave molding technology, hydraulic kettle molding technology, thermal expansion molding technology, sandwich structure molding technology, molding material production process, SMC molding material injection technology, compression molding process, laminate production technology, rolled tube molding technology, fiber winding product molding technology, continuous plate production process, casting molding technology, pultrusion molding process, continuous winding tube making process, woven composite material manufacturing technology, thermoplastic sheet molding material manufacturing technology and cold die stamping molding process, injection molding process, extrusion molding process, centrifugal casting tube making process, etc.

[0047] The composite material can be applied to fields including but not limited to aerospace, automobile industry, chemical textile and machinery manufacturing, medicine, biology, construction, pipelines, etc.

[0048] The composite material according to the present invention has excellent adhesion to the coating, is universal for a variety of coatings, and is adaptable to a wider range of application scenarios. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with specific examples. However, it should be understood that these examples are only used to illustrate the present invention and do not constitute a limitation to the scope of the present invention.

[0050] The following examples do not specify specific experimental methods, but are generally carried out under conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, all percentages and parts are calculated by weight.

[0051] The raw materials used in the examples are as follows:

[0052] Isocyanate component (A): WANNATE PM200, NCO content 31.2wt%, Wanhua Chemical;

[0053] Polyol 1: glycerol, molecular weight 92, hydroxyl value 1829 mgKOH / g (b1 component, functionality 3);

[0054] Polyol 2: glycerol-initiated, molecular weight 350, hydroxyl value 481 mgKOH / g, propylene oxide polymerization: (b1 component, functionality 3);

[0055] Polyol 3: sorbitol-based, molecular weight 1000, hydroxyl value 337 mgKOH / g, ethylene oxide polymerization (b1 component, functionality 6);

[0056] Polyol 4: starting with ethylene glycol, molecular weight 5000, hydroxyl value 22 mgKOH / g, copolymerization of propylene oxide and ethylene oxide, polyoxyethylene content 40 wt%; (b2 component, functionality 2);

[0057] Polyol 5: starting with glycerol, molecular weight 1000, hydroxyl value 168 mgKOH / g, ethylene oxide polymerization, polyoxyethylene content 100 wt%; (b2 component, functionality 3);

[0058] Polyol 6: starting with sorbitol, molecular weight 6000, hydroxyl value 56mgKOH / g, ethylene oxide polymerization and phthalic acid polycondensation to generate polyoxyethylene polyester polyol, polyoxyethylene content 60wt%; (b2 component, functionality 6);

[0059] Polyol 7: Ethylene glycol starting material, molecular weight 4000, hydroxyl value 28 mgKOH / g, copolymerization of propylene oxide and ethylene oxide, polyoxyethylene content 25 wt%; (functionality 2);

[0060] Polyol 8: ethylene glycol starting, molecular weight 4000, hydroxyl value 28 mgKOH / g, propylene oxide polymerization, polyoxypropylene content 100 wt%; (b3 component, functionality 2);

[0061] Catalyst: Tin laurate

[0062] Reinforcement material components: ECT 467R-4800 glass fiber, purchased from Chongqing International Composite Materials Co., Ltd.;

[0063] Internal release agent component: HB-650D, TECHNICK PRODUCTS;

[0064] Molecular desiccant: natural zeolite

[0065] Coating ingredients:

[0066] Fiberbond M7000W matte black water-based paint, purchased from Nippon Paint (China) Co., Ltd.;

[0067] BC-706W water-based fluorocarbon coating, purchased from Shanghai Hengfeng Fluorocarbon Materials Co., Ltd.;

[0068] Table 1: Content of each component of the polyurethane forming system in the examples and comparative examples

[0069]

[0070] Note: The polyoxyethylene content in polyol 7 in comparative example 1 is less than 30 wt%, and it does not correspond to component b2; polyol 8 in comparative example 2 corresponds to component b3, but its content exceeds 10 wt%.

[0071] The polyurethane forming systems obtained in Examples 1 to 4 and Comparative Examples 1 to 2 are prepared into polyurethane pultruded composite material profile products by pultrusion process, and the specific steps are as follows:

[0072] Lead 105 glass fibers from the yarn rack, pass through the yarn feeding plate, enter the glue injection box, pass through the mold cavity, tie the glass fibers passing through the mold cavity to the traction belt, place the traction belt in the traction machine, turn on the traction device, and turn off the traction device after all the glass fibers are pulled straight. Turn on the mold heating system, and heat in three zones. The heating temperature is 80°C, 190°C, and 170°C from the yarn inlet to the yarn outlet, respectively. The heating time is greater than or equal to 1 hour to ensure that the mold is fully heated. Subsequently, start the glue injection machine, and continuously deliver the above components to the static mixer according to the amount shown in Table 1. The resin mixed by the mixer is injected into the glue injection box until the glass fiber is fully soaked. Then turn on the traction device, pull the glass fiber soaked with resin forward, and cut it after being cured and formed in the heating zone and separated from the mold to obtain the desired composite sheet.

[0073] The prepared composite material sheet has a resin weight content of 20wt% and a glass fiber weight content of 80wt%, the weights of which are based on 100wt% of the composite material sheet. The serial numbers of the prepared composite materials are shown in Table 2.

[0074] Experimental Examples

[0075] Use FiberBangcai M7000W matte black water-based paint and BC-706W water-based fluorocarbon paint to spray on the profile surface respectively, put it into an 80℃ oven and bake it for 2 hours. The paint film thickness is about 50 microns, and finally the painted products are obtained.

[0076] The obtained products were tested for coating adhesion according to GBT9286-1998, and the adhesion between the coating and the composite material was tested by the 100-grid method. The test results are listed in Table 3, where the numerical values ​​of 0-5 represent the meanings shown in Table 4. In this method, a 100-grid square of 10*10 is formed on the sample with a 100-grid knife, and then a transparent force-sensitive tape is adhered to the square, and then the tape is torn off with an instantaneous force, and the peeling area is recorded and graded according to the standards shown in Table 4.

[0077] Table 2: Composite material serial number

[0078] Polyurethane composition Composite material serial number Comparative Example 1 1 Comparative Example 2 2 Example 1 3 Example 2 4 Example 3 5 Example 4 6

[0079] Table 3: Adhesion test results

[0080] coating M7000W BC-706W Composite Materials 1 5 5 Composite Materials 2 5 5 Composite Materials 3 0 0 Composite Materials 4 0 0 Composite materials 5 0 0 Composite materials 6 0 0

[0081] Table 4: 100-grid test result levels

[0082]

[0083] It can be seen from the above experimental results that the polyurethane composite material profile prepared based on the polyurethane composition invented in this article has excellent adhesion between coatings, is compatible with a variety of coatings, and has universal applicability.

Claims

1. A polyurethane forming system comprising the following components: (A) isocyanate; (B) an isocyanate-reactive component comprising: (b1) one or more organic polyols having a number average molecular weight of 1000 or less, an average functionality of 2 to 8, and a hydroxyl value of 201 to 2000 mgKOH / g, and an amount of 50 wt% to 95 wt%, preferably 50 wt% to 90 wt%, of the total mass of the isocyanate-reactive component; (b2) one or more organic polyols, wherein the content of polyoxyethylene segments is 30 wt% or more, the average functionality is 2 to 8, and the hydroxyl value is 1 to 200 mgKOH / g, and the amount thereof is 5 wt% to 50 wt%, preferably 10 wt% to 50 wt% of the total mass of the isocyanate-reactive component; (b3) one or more organic polyols, which contain polyoxypropylene segments and the content of the polyoxypropylene segments is 90wt% or more, have a number average molecular weight of 2000 to 10000, and a hydroxyl value of 120mgKOH / g or less, and are used in an amount of 0wt% to 10wt% of the total mass of the isocyanate-reactive component, preferably 0wt% to 5wt%; (C) Catalyst.

2. The polyurethane forming system according to claim 1, wherein The weight ratio of the isocyanate (A) to the isocyanate-reactive component (B) is 0.9 to 1.

5.

3. The polyurethane forming system according to claim 1 or 2, wherein: The isocyanate (A) is selected from toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, naphthalene diisocyanate, p-phenylene diisocyanate, 1,4-cyclohexane diisocyanate, xylylene diisocyanate, cyclohexane dimethylene diisocyanate, trimethyl-1,6-hexamethylene diisocyanate, tetramethyl meta-xylylene diisocyanate, norbornane diisocyanate, dimethyl biphenyl diisocyanate, methyl cyclohexyl diisocyanate, tetramethylene diisocyanate, 2-methylpentamethylene diisocyanate, dodecamethylene One or more isocyanates selected from diisocyanate, 4,4'-diisocyanato-3,3'-dimethyldicyclohexylmethane, 4,4'-diisocyanato-2,2-dicyclohexylpropane, poly(hexamethylene diisocyanate), octamethylene diisocyanate, toluene-α,4-diisocyanate, 2,4,6-trimethyl-1,3-phenylene diisocyanate, 4-chloro-6-methyl-1,3-phenylene diisocyanate, poly(tetrafluoroethylene oxide-co-difluoromethyleneoxy) α,ω-diisocyanate, 1,4-butane diisocyanate, 1,8-octane diisocyanate and isocyanate prepolymers and modified products thereof.

4. The polyurethane forming system according to any one of claims 1 to 3, wherein The organic polyol (b1) component is selected from one or more of polyether polyols, polyester polyols, polyether carbonate polyols, polycarbonate polyols and bio-based polyols, preferably one or more of polyether polyols, polyester polyols and bio-based polyols.

5. The polyurethane forming system according to claim 4, wherein The initiator used to form the polyether polyol is selected from one or more of water, ethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, 1,2-pentanediol, hexanediol, diethylene glycol, triethylene glycol, dipropylene glycol, diethylene glycol, neopentyl glycol, glycerol, trimethylolpropane, pentaerythritol, sorbitol, bisphenol A and bisphenol S; and the alkylene oxide used to form the polyether polyol is selected from one or more of ethylene oxide, propylene oxide, 1,2-butylene oxide, 2,3-butylene oxide, tetrahydrofuran and styrene oxide; The catalyst used to form the polyether polyol is selected from one or more of an alkaline hydroxide, an alkaline alkoxide and antimony pentachloride; Preferably, the dibasic acid used to form the polyester polyol is selected from one or more of phthalic acid, phthalic anhydride, phthalic acid esters, adipic acid and halogenated phthalic acid; the polyol used to form the polyester polyol is selected from one or more of ethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, 1,2-pentanediol, hexanediol, diethylene glycol, triethylene glycol, dipropylene glycol, diethylene glycol, neopentyl glycol, glycerol, trimethylolpropane, pentaerythritol, sorbitol, bisphenol A and bisphenol S; the lactone used to form the polyester polyol is selected from one or more of butyrolactone, dodecanolactone and tetradecanolactone.

6. The polyurethane forming system according to any one of claims 1 to 5, wherein The organic polyol (b2) is selected from one or more of polyoxyethylene polyol, polyoxyethylene and polyoxypropylene copolymer polyol and copolymer of polyoxyethylene and polyester polyol.

7. The polyurethane forming system according to any one of claims 1 to 6, wherein The catalyst (C) is an amine catalyst or an organometallic catalyst, preferably one or more selected from triethylamine, tributylamine, triethylenediamine, N-ethylmorpholine, N,N,N',N'-tetramethyl-ethylenediamine, pentamethyldiethylene-triamine, N,N-methylaniline, N,N-dimethylaniline, tin (II) acetate, tin (II) octoate, tin ethylhexanoate, tin laurate, dibutyltin oxide, dibutyltin dichloride, dibutyltin diacetate, dibutyltin maleate and dioctyltin diacetate; Preferably, the catalyst (C) is used in an amount of 0.05 wt% to 2 wt% of the total weight of the isocyanate-reactive component (B).

8. The polyurethane forming system according to any one of claims 1 to 7, wherein The polyurethane forming system further comprises one or more additives selected from chain extenders, small molecule raw materials, internal mold release agents, flame retardants, fillers, pigments, antioxidants, foaming agent stabilizers, light stabilizers, auxiliary antioxidants, hydrolysis stabilizers, bactericides and mildewicides, defoamers, rheological agents, leveling agents, wetting agents, active diluents, coupling agents, color pastes, catalysts, dewatering agents and molecular sieves.

9. A composite material comprising: Relative to 100wt% of the composite material, 15 wt% to 40 wt% of a polyurethane resin matrix, which is prepared from the polyurethane forming system according to the present invention; and 60wt% to 85wt% of reinforcing material.

10. The composite material according to claim 9, wherein The reinforcing material is selected from one or more of glass fiber, carbon fiber, polyester fiber, natural fiber, aromatic polyamide fiber, nylon fiber, basalt fiber, boron fiber, silicon carbide fiber, asbestos fiber, whisker and metal fiber; Preferably, the composite material is prepared by one of hand lay-up molding process, injection molding process, resin transfer molding technology (RTM technology), bag pressing method (pressure bag method) molding, vacuum bag pressing molding, autoclave molding technology, hydraulic kettle molding technology, thermal expansion molding technology, sandwich structure molding technology, molding material production process, SMC molding material injection technology, compression molding process, laminate production technology, rolled tube molding technology, fiber winding product molding technology, continuous plate production process, casting molding technology, pultrusion molding process, continuous winding tube making process, woven composite material manufacturing technology, thermoplastic sheet molding material manufacturing technology and cold die stamping molding process, injection molding process, extrusion molding process and centrifugal casting tube making process.

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